A yawn is a reflex consisting of the simultaneous inhalation of air and the
stretching of the ... This "contagious" yawning has also been observed in
chimpanzees, dogs, and can occur acros...
Mar 16, 2014 ... About half of adults yawn after someone else yawns due to a universal
phenomenon called “contagious yawning.” Researchers at Duke ...
Jun 28, 2013 ... Mimicry is likely at the heart of why yawning is contagious. This is because
yawning may be a product of a quality inherent in social animals: ...
Update (Jan 2016): I wrote this answer several years ago. Though it currently has
accumulated the most votes, there are now much better answers others have ...
Dec 10, 2014 ... Why do we yawn? The center of many a scientific study, researchers have
several theories about the science behind this contagious ...
Dec 15, 2011 ... Ever wonder why we yawn or why yawning is contagious? We take a look at the
most popular answers to this frequently asked question.
Jul 8, 2016 ... People high in psychopathic personality traits often don't "catch" the contagious
yawn, a new study finds.
Jun 10, 2013 ... We all do it, and we all know it has at least something to do with how tired we feel
. But unlike sleep apnea or laptops in the bedroom, yawning is ...
Oct 3, 2016 ... Yawning seems to be pretty much ubiquitous in the animal kingdom, and for
some animals — many humans included — it really is contagious.
Sep 24, 2007 ... Contagious yawning is not a strictly human habit, though. Research shows that a
couple animals related to our species, like chimps, do it too.